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[m68k] Integrate Motorola Integer Software Package (68060SP), for '060 #492

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Merged
travisg merged 1 commit into from
Jan 8, 2026
Merged

[m68k] Integrate Motorola Integer Software Package (68060SP), for '060 #492

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11 changes: 10 additions & 1 deletion arch/m68k/exceptions_asm.S
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,9 @@
// so it's easy to just vector most of the handlers into one of a few classes of handlers
// and decode the vector in C.

.weak _060_isp_unimp
_060_isp_unimp:

.align 4
_m68k_irq_vector:
// TODO: save less state for IRQs
Expand Down Expand Up @@ -71,7 +74,13 @@ DATA(exc_vectors)
.endr
.org (48 * 4)
// start of FPU, MMU vectors
.rept (64 - 48)
.rept (61 - 48)
.long _m68k_general_exception
.endr
.org (61 * 4)
.long _060_isp_unimp
.org (62 * 4)
.rept (64 - 62)
.long _m68k_general_exception
.endr
.org (64 * 4) // offset 0x100
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8 changes: 8 additions & 0 deletions arch/m68k/rules.mk
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Expand Up @@ -32,10 +32,18 @@ else ifeq ($(M68K_CPU),68030)
ARCH_COMPILEFLAGS := -mcpu=68030
else ifeq ($(M68K_CPU),68040)
ARCH_COMPILEFLAGS := -mcpu=68040
else ifeq ($(M68K_CPU),68060)
ARCH_COMPILEFLAGS := -mcpu=68060
else
$(error add support for selected cpu $(M68K_CPU))
endif

M68K_68060SP := $(filter 68020 68030 68040 68060,$(M68K_CPU))

ifneq ($(M68K_68060SP),)
MODULE_DEPS += arch/m68k/68060SP
endif

LIBGCC := $(shell $(TOOLCHAIN_PREFIX)gcc $(GLOBAL_COMPILEFLAGS) $(ARCH_COMPILEFLAGS) $(GLOBAL_COMPILEFLAGS) -print-libgcc-file-name)
$(info LIBGCC = $(LIBGCC))

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293 changes: 293 additions & 0 deletions external/arch/m68k/68060SP/iskeleton.S
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@@ -0,0 +1,293 @@
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
|M68000 Hi-Performance Microprocessor Division
|M68060 Software Package
|Production Release P1.00 -- October 10, 1994
|
|M68060 Software Package Copyright © 1993, 1994 Motorola Inc. All rights reserved.
|
|THE SOFTWARE is provided on an "AS IS" basis and without warranty.
|To the maximum extent permitted by applicable law,
|MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
|INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
|and any warranty against infringement with regard to the SOFTWARE
|(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials.
|
|To the maximum extent permitted by applicable law,
|IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
|(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
|BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
|ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
|Motorola assumes no responsibility for the maintenance and support of the SOFTWARE.
|
|You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
|so long as this entire notice is retained without alteration in any modified and/or
|redistributed versions, and that such modified versions are clearly identified as such.
|No licenses are granted by implication, estoppel or otherwise under any patents
|or trademarks of Motorola, Inc.
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| iskeleton.s
|
| This file contains:
| (1) example "Call-out"s
| (2) example package entry code
| (3) example "Call-out" table
|
| littlekernel general changes:
| - Removed Linux-specific includes
| - Modified 'isp.sa' file path
| - Convert branch instruction in _060_real_divbyzero
|


|################################
| (1) EXAMPLE CALL-OUTS #
| #
| _060_isp_done() #
| _060_real_chk() #
| _060_real_divbyzero() #
| #
| _060_real_cas() #
| _060_real_cas2() #
| _060_real_lock_page() #
| _060_real_unlock_page() #
|################################

|
| _060_isp_done():
|
| This is and example main exit point for the Unimplemented Integer
| Instruction exception handler. For a normal exit, the
| _isp_unimp() branches to here so that the operating system
| can do any clean-up desired. The stack frame is the
| Unimplemented Integer Instruction stack frame with
| the PC pointing to the instruction following the instruction
| just emulated.
| To simply continue execution at the next instruction, just
| do an "rte".
|
| littlekernel changes: Remove user space exception check
|

.global _060_isp_done
_060_isp_done:
rte

|
| _060_real_chk():
|
| This is an alternate exit point for the Unimplemented Integer
| Instruction exception handler. If the instruction was a "chk2"
| and the operand was out of bounds, then _isp_unimp() creates
| a CHK exception stack frame from the Unimplemented Integer Instrcution
| stack frame and branches to this routine.
|
| littlekernel changes: Call m68k_trap_exception, remove tracing check
|

.global _060_real_chk
_060_real_chk:
|
| CHK FRAME TRACE FRAME
| ***************** *****************
| * Current PC * * Current PC *
| ***************** *****************
| * 0x2 * 0x018 * * 0x2 * 0x024 *
| ***************** *****************
| * Next * * Next *
| * PC * * PC *
| ***************** *****************
| * SR * * SR *
| ***************** *****************
|

real_chk_end:
bral m68k_trap_exception

|
| _060_real_divbyzero:
|
| This is an alternate exit point for the Unimplemented Integer
| Instruction exception handler isp_unimp(). If the instruction is a 64-bit
| integer divide where the source operand is a zero, then the _isp_unimp()
| creates a Divide-by-zero exception stack frame from the Unimplemented
| Integer Instruction stack frame and branches to this routine.
|
| Remember that a trace exception may be pending. The code below performs
| no action associated with the "chk" exception. If tracing is enabled,
| then it create a Trace exception stack frame from the "chk" exception
| stack frame and branches to the _real_trace() entry point.
|
| littlekernel changes:
| - bpls -> bplw in _060_real_divbyzero
| - Remove tracing check
|

.global _060_real_divbyzero
_060_real_divbyzero:
|
| DIVBYZERO FRAME TRACE FRAME
| ***************** *****************
| * Current PC * * Current PC *
| ***************** *****************
| * 0x2 * 0x014 * * 0x2 * 0x024 *
| ***************** *****************
| * Next * * Next *
| * PC * * PC *
| ***************** *****************
| * SR * * SR *
| ***************** *****************
|
| littlekernel changes: Call m68k_trap_exception
|

real_divbyzero_end:
bral m68k_trap_exception

|##########################

|
| _060_real_cas():
|
| Entry point for the selected cas emulation code implementation.
| If the implementation provided by the 68060ISP is sufficient,
| then this routine simply re-enters the package through _isp_cas.
|
.global _060_real_cas
_060_real_cas:
bral _I_CALL_TOP+0x80+0x08

|
| _060_real_cas2():
|
| Entry point for the selected cas2 emulation code implementation.
| If the implementation provided by the 68060ISP is sufficient,
| then this routine simply re-enters the package through _isp_cas2.
|
.global _060_real_cas2
_060_real_cas2:
bral _I_CALL_TOP+0x80+0x10

|
| _060_lock_page():
|
| Entry point for the operating system`s routine to "lock" a page
| from being paged out. This routine is needed by the cas/cas2
| algorithms so that no page faults occur within the "core" code
| region. Note: the routine must lock two pages if the operand
| spans two pages.
| NOTE: THE ROUTINE SHOULD RETURN AN FSLW VALUE IN D0 ON FAILURE
| SO THAT THE 060SP CAN CREATE A PROPER ACCESS ERROR FRAME.
| Arguments:
| a0 = operand address
| d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
| d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
| Expected outputs:
| d0 = 0 -> success; non-zero -> failure
|
.global _060_real_lock_page
_060_real_lock_page:
clr.l %d0
rts

|
| _060_unlock_page():
|
| Entry point for the operating system`s routine to "unlock" a
| page that has been "locked" previously with _real_lock_page.
| Note: the routine must unlock two pages if the operand spans
| two pages.
| Arguments:
| a0 = operand address
| d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
| d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
|

.global _060_real_unlock_page
_060_real_unlock_page:
clr.l %d0
rts

|###########################################################################

|#################################
| (2) EXAMPLE PACKAGE ENTRY CODE #
|#################################

.global _060_isp_unimp
_060_isp_unimp:
bral _I_CALL_TOP+0x80+0x00

.global _060_isp_cas
_060_isp_cas:
bral _I_CALL_TOP+0x80+0x08

.global _060_isp_cas2
_060_isp_cas2:
bral _I_CALL_TOP+0x80+0x10

.global _060_isp_cas_finish
_060_isp_cas_finish:
bra.l _I_CALL_TOP+0x80+0x18

.global _060_isp_cas2_finish
_060_isp_cas2_finish:
bral _I_CALL_TOP+0x80+0x20

.global _060_isp_cas_inrange
_060_isp_cas_inrange:
bral _I_CALL_TOP+0x80+0x28

.global _060_isp_cas_terminate
_060_isp_cas_terminate:
bral _I_CALL_TOP+0x80+0x30

.global _060_isp_cas_restart
_060_isp_cas_restart:
bral _I_CALL_TOP+0x80+0x38

|###########################################################################

|###############################
| (3) EXAMPLE CALL-OUT SECTION #
|###############################

| The size of this section MUST be 128 bytes!!!

_I_CALL_TOP:
.long _060_real_chk - _I_CALL_TOP
.long _060_real_divbyzero - _I_CALL_TOP
.long _060_real_trace - _I_CALL_TOP
.long _060_real_access - _I_CALL_TOP
.long _060_isp_done - _I_CALL_TOP

.long _060_real_cas - _I_CALL_TOP
.long _060_real_cas2 - _I_CALL_TOP
.long _060_real_lock_page - _I_CALL_TOP
.long _060_real_unlock_page - _I_CALL_TOP

.long 0x00000000, 0x00000000, 0x00000000, 0x00000000
.long 0x00000000, 0x00000000, 0x00000000

.long _060_imem_read - _I_CALL_TOP
.long _060_dmem_read - _I_CALL_TOP
.long _060_dmem_write - _I_CALL_TOP
.long _060_imem_read_word - _I_CALL_TOP
.long _060_imem_read_long - _I_CALL_TOP
.long _060_dmem_read_byte - _I_CALL_TOP
.long _060_dmem_read_word - _I_CALL_TOP
.long _060_dmem_read_long - _I_CALL_TOP
.long _060_dmem_write_byte - _I_CALL_TOP
.long _060_dmem_write_word - _I_CALL_TOP
.long _060_dmem_write_long - _I_CALL_TOP

.long 0x00000000
.long 0x00000000, 0x00000000, 0x00000000, 0x00000000

|###########################################################################

| 060 INTEGER KERNEL PACKAGE MUST GO HERE!!!
|
| littlekernel changes: Adjust path to isp.sa in source tree
|
.include "external/arch/m68k/68060SP/isp.sa"
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